# Radiometric dating chapter 25

### Index

- How does radiometric dating determine the age of fossils?
- What are the limitations of radiometric dating?
- Why do scientists reject all but the oldest dating methods?
- How is the age of rocks determined by radiometric dating?
- What is the most common method of dating fossils?
- How do you determine the age of a radioactive isotope?
- Why do scientists use multiple methods to date specimens?
- Is there such a thing as an accurate dating technique?
- Do all the dating methods give similar dates?

### How does radiometric dating determine the age of fossils?

Radiometric dating is a technique for determining the age of fossils that is based on the fact that specific radioactive isotopes decay at a constant rate. Each isotope has a characteristic half-life, which is the time required for half of that isotope to decay.

### What are the limitations of radiometric dating?

The shortcomings of the radiometric dating method is one of many indications that our earth is only a maximum of 10,000 years old and was created by God. Another problem that calls into question the credibility of radiometric dating is heat contamination.

### Why do scientists reject all but the oldest dating methods?

Yet when asked why they reject all but the oldest science-based dating methods, the answer often given is that (they think) long-age radiometric dating is more reliable and that science settled the matter of the earth’s age many years ago.

### How is the age of rocks determined by radiometric dating?

Radiometric dating is a method of finding the absolute age of rocks by looking at radioactive decay within igneous rocks. Contrast this with stratigraphy, which only provides the relative, not absolute, ages.

### What is the most common method of dating fossils?

The majority of the time fossils are dated using relative dating techniques. Using relative dating the fossil is compared to something for which an age is already known. For example if you have a fossil trilobite and it was found in the Wheeler Formation.

### How do you determine the age of a radioactive isotope?

Radiometric dating calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element, e.g., carbon-14, or a long-life radioactive element plus its decay product, e.g., potassium-14/argon-40.